Steam-trap.



. PATBNTBD 00T. 6, 1903. H. H. HUMPHREY.

STEAM TRAP. APPLIO'ATIONHLED HAY 12, 190s.

f UNITED STATES PATENT Patented October 6, 1903;

FFICE.

HENRY H. HUMPHREY, OF. DETROIT, MICHIGAN, ASSIGNOR TO WRIGHTMANUFACTURING COMPANY OF DETROIT, MICHIGAN, CORPORA-- 'IION' OFMICHIGAN- STEAM-TRA P.

.BE'ECIFICATION forming part of Letters Patent No. 740,435, datedOctober 6, 1903. Application filed May 12, 1903. Scrial'lol 156,734. (Nomodel.)

' provide a trap havin ga discharge-valve open# ing of substantially thesame area as the in-4 let-pipe and alsoto provide a trap having adischarge-valve opening outward whose operation may be assisted by thepressure of,

the water in the trap. Iattain these objects by the constructionillustrated in the accompanying drawing, which is a sectional view ofthe trap.

In construction the trap comprises two parts or sections Aand B, whichform the casing. The part B has the opening C for the inlet-pipe, anopening D for the dischargepipe, and the opening E, into which isscrewed the blow-od valve F. The depending wall or screen G extendsacross the lower pa'rt B- of the casing anddownward to near the bottom,thus causing the water of condensation to enter the main part of thecasing at its lowest point, and thus insure a water seal sufficient toprevent the passage of steam.

The part A-is secured to the part B to'form a water-tight joint. It isprovided with the dome H and the outlet-passage J. Secured in thesection A, preferably by screw-threads, is the pipe K, into the lowerend of which at a is pivoted the lever L. To the outer end of this leverat c isA pivoted the rod M, at the -upper end of which is the hollowiioat N,

preferably spherical vin form. Threaded in the upper end of pipe K isthe valve-seat O. The valve P engages this seat, being supported by therod R, which at its lower end is pivoted to the lever L at b.Intermediate the valveand pivotal point the rod R is guided in the guideS, attached to the'iuside ofthe pipe or made integral with the same.

justing screw, as shown.

The passage J connects with the outlet-open ing D in the part B. A

It will be noticed/that the distance fro-m the fnlcrum a of the lever Lto the point c is mau-y times greater than from ot to l?. The

'result of this is that for low pressures of steam the weight of thelever L and of the float N will be sufficient to keep the valve closed.For example, a float four inches iu diameter two-thirds submerged willdisplace one pound of Water. The weight of this float acting on a leverof twelve to one will exert a downward pressure of fifteen pounds ofsteam against the valve when the valve-seat opening is one inch indiameter. For higher Apressures the weight of the iioatN is slightlyincreased, the increase Vin diameter not being necessary, the slightlack of buoyancy being compensated by the pressure of the wa. teragainst the valve. Y

For very high pressures the following mechanism is provided: The plug Tscrews through the casing A at a poi-nt -jnst over the valve P. Anadjusting-screw V passes' through this plug and has a flange at itslower end. The rod R is extended upward above the valve and guides thespring W, which rests on the valveand has its tension adjusted by thead- It' advisable, the adj usting-screw may be made hollow and the upperend of rod R made small enough to pass u p into the same and be guidedthereby.

The operation of the trap is as follows: To the opening C is connectedthe drip or waste pipe of thel steam system to be drained. The combinedsteam and water-pass down around the bottom of wall G until the trap isfilled with water up to the bottom line of said Wall, when no more steamcan enter. The water continues to enter until its height reaches theupper Water-line Y, when its pressure against the valve and the buoyancyof the iioat lift the valve from its seat and permit the discharge ofthe accumulated water. On account ofthe construction of the passage Jand the position of the pipe K a Siphon-like action is obtained and thewater is drained down to the lower water-line Xor until the water fallsfar enough to permit the weight of the oat ,to exert a closing force onthe valve. The

blow-ol F is provided, so that all impurities may be easily removed.

Having now explained my construction, what I claim as my invention, anddesire to secure by Letters Patent, is-A l. In a steam-trap, thecombination of a casing, a valve-seat, a valve resting on said seat, andmeans operable by the water in the casing for raising said Valve off theseat, in combination with adjustable means for resisting the opening ofsaid valve.

2. In a steam-trap, the combination of a casing, a valve-seat, a valveresting on said seat, and means operable by the water in the casing forholding said valve down on said seat, in combination withadjustable'means for resisting the opening of said valve.

3. In asteam-trap, the combination ofacasing, a valve-seat', a valveresting on said seat, and means operable by the water in the casing forholding valve down on seat and for raising it off said seat, incombination with adjustable means for resisting the opening of saidvalve.

4. In a steam-trap, the combination of a casing, a valve-seat, a valveresting on said seat, and means operable by the water in the casing forraising valve oft said seat and for holding said valve down on saidseat, and auxiliary means for holding down said valve comprising aspring, and means whereby the tension of said spring is adjusted.

5. In asteam-trap, the combination of a casing having inlet and outletopenings, a valveseat having approximately the same area as saidinletopening, a valve resting on said seat, and means operable by thewater in the casing for raising said valve off its seat, in combinationwith adjustable means for resisting the opening of said valve.

6. In asteam-trap, the combination of acasing having inlet and outletopenings, a valveseat having approximately the same area as saidoutlet-opening, a valve resting on said seat and means operable by thewater in the casing for raising said Valve o its seat, in combinationwith adjustable means for resisting the opening of said valve.

7. In a steam-trap, the combination of a casing having an inlet-opening,a tube screwed into a part of said casing, a valve-seatsorewed into theend of said tube and having an opening approximately the same area asthe inletopening, a valve resting on said seat, a lever pivoted at oneend in the other end of said tube, a iioat for raising the other end ofsaid lever, and a rod connected to said valve and pivoted to said lever,the weight of the float and the position of the pivots in the leverbeing such that the valve will be held down against the seat until theioat is raised by the accumulated water, in combination with adjustablemeans for resisting the opening of said valve.

8. 'In a steam-trap, the combination of the casing, a tube lsupportedtherein, a valve-seat secured at one end of the tube, a valve resting onsaid seat, a lever pivoted at one end in the end of the tube, a rodattached to said valve and pivoted to said lever near its pivoted end, aguide for said rod attached to the inside of said tube, a float attachedto the 'free end of the lever, and auxiliary adjustable means forholding the valve on its seat. In testimony whereof I aix my signaturein presence of two Witnesses.

HENRY H. HUMPHREY. Witnesses:

H. C. SMITH, JAS. P. BARRY.

